Pekka Potka's take on the A7R and the EM1

is Alpha FF limping along with just a few Zeiss lenses, years after its introduction. Yes, there were promises from Sony on that one, too. Apparently, Sony doesn't have the optical experience to make FF optimized glass.

They didn't exactly go whole hog with NEX, either... they have about eleven lenses (if you discount barrel color variations), to M43's 40+.

Just keep in mind the company making the A7 isn't capable of making FF lenses for it. So don't expect it to mushroom as rapidly as M43 did with its glass. Or grow at all - aftermarket lens makers have no legal or financial obligation to support it, especially once the hype dies down.

There's a big difference between the head of your company telling your optical department to get to work, and the head of another company asking your optical department nicely to get to work on expensive glass for an unproven platform.